2. We ought to be careful.

- ought to V: nên làm gì 

3. I was able to finish all my work.

- be able to V: có thể làm gì

4. It must have been a terrible experience for you.

- must have PII: chắc hẳn đã làm gì

5. Players aren't allowed to have a drink. 
- be allowed to V: được phép làm gì 

6. You had better sit down.

- had better V: nên làm gì

7. The report has to be on my desk tomorrow.

- have to V: phải làm gì

8. Joanna might not have received my message.

- might have PII: có thể đã làm gì

9. Martin can't be jogging in this weather.

- can V: có thể làm gì

10. Nancy didn't have to clean the flat.

- have to V: phải làm gì

`text{2. We ought to be careful}`

`text{3. I was able to finish all my work}`

`text{4. It must have been a terrible experience for you}`

`text{5. Players aren't allowed to have a drink}`

`text{6. You had better sit down}`

`text{7. The report has to be on my desk tomorrow}`

`text{8. Joanna might not have received my message}`

`text{9. Martin can't be jogging in this weather}`

`text{10. Nancy didn't have to clean the flat}`

`text{em cầu xin Mod đừng xóa câu trả lời ạ!}`